SELECTIVE SURFACE OZONATION OF POLYVINYL CHLORIDE FOR ITS SEPARATION FROM WASTE PLASTIC MIXTURE BY FROTH FLOATATION
The separation of waste plastics is important for its feedstock and mechanical recycling. The selective surface hydrophilization of polyvinyl chloride (PVC) by ozonation was studied as the pre-treatment of its separation by the following froth flotation. The ozonation could selectively increase the hydrophilicity of the surface of PVC among plastic mixture with three other plastics. The hydrophilization of PVC by surface analysis would be due to the hydrophilic groups produced by ozonation. XPS and AFM analysis revealed that the increase was due to the structural change in chlorine group in PVC to hydroxylic acid, ketone and carboxylic groups by ozonation. The separation of PVC from other plastics could be achieved by the combination of the pre-ozonation and the following froth floatation. The effect of some condition onto separation efficiency in the froth floatation was also investigated.
Froth floatation hydrophilization ozonation PVC
Tetsuji Okuda Keisuke Kurose Mallampati Srinivasa Reddy Tsung-Yueh Tsai Satoshi Nakai Wataru Nishijima Mitsumasa Okada
Environmental Research and Management Center,Hiroshima University, 1-5-3 Kagamiyama, Higashi-Hiroshi Department of Chemical Engineering, Graduate School of Engineering,Hiroshima University, 1-4-1 Kagam
国际会议
成都
英文
141-147
2009-10-11（万方平台首次上网日期，不代表论文的发表时间）